3869729568 has 72 divisors (see below), whose sum is σ = 11272981356. Its totient is φ = 1258444800.

The previous prime is 3869729561. The next prime is 3869729603. The reversal of 3869729568 is 8659279683.

3869729568 is a `hidden beast` number, since 3 + 8 + 69 + 7 + 2 + 9 + 568 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2502800784 + 1366928784 = 50028^2 + 36972^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (3869729561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 152053 + ... + 175668.

Almost surely, 2^3869729568 is an apocalyptic number.

It is an amenable number.

3869729568 is an abundant number, since it is smaller than the sum of its proper divisors (7403251788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3869729568 is a wasteful number, since it uses less digits than its factorization.

3869729568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327778 (or 327767 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The square root of 3869729568 is about 62207.1504571621. The cubic root of 3869729568 is about 1569.9778984542.

It can be divided in two parts, 38697 and 29568, that added together give a triangular number (68265 = T₃₆₉).

The spelling of 3869729568 in words is "three billion, eight hundred sixty-nine million, seven hundred twenty-nine thousand, five hundred sixty-eight".